Tern GSD walk assistance: use the sequence for your Gen 3 controls

Tern GSD walk assistance is a function for pushing the bicycle, and the GSD Gen 3 guide gives two different activation sequences. Matching the installed Bosch controls matters: the Smart System procedure is not the same as the Purion procedure described for eBike System 2. Neither sequence is a substitute for controlling the bicycle yourself.

Start Tern GSD walk assistance on the Smart System

Printed page seven describes holding the decrease-assistance button for more than one second and continuing to hold it. A moving white indication shows readiness. Within the next ten seconds, the guide calls for moving the bicycle forward or backward, or making the described sideways tilting movement, to activate assistance.

Once assistance begins, the indicator changes to ice-blue. Releasing the decrease button stops the function, and the guide describes a ten-second window for reactivation with that button. The stated maximum is four kilometres per hour, with actual speed depending on the selected gear. Learn this in a clear practice area before needing it in a confined route.

Recognize the separate Purion procedure

For the eBike System 2 arrangement, printed page twelve says to press WALK briefly, then press and hold the increase-assistance button within three seconds. Its stated maximum is six kilometres per hour, again depending on the selected gear. The different button, time window and speed limit explain why a tutorial for the other system can seem unresponsive.

Both sections say walk assistance cannot be activated with assistance set to OFF. Both also make availability subject to local regulations, which can change operation or deactivate the feature. If a correctly identified system does not match the guide, ask the dealer about its actual configuration instead of seeking an unofficial way around a restriction.

Separate a normal stop from a problem

The Smart System description lists interruptions including a blocked rear wheel, an obstacle the bicycle cannot pass and starting to pedal. The System 2 list includes releasing the held button, a locked wheel and exceeding its stated speed. These conditions mean an interruption is not automatically evidence of a failed motor.

Use the function only while pushing, with the wheels in contact with the ground as the warning requires. Keep clear of the cranks and do not repeatedly activate assistance against an obstruction. If unexplained stopping continues, record the controls, assistance setting and circumstances for the dealer rather than increasing force or treating the motor as a lifting aid.

Walk-assistance FAQ

Is the documented maximum identical for both systems?

No. This guide gives four kilometres per hour for the Smart System and six for the described System 2 arrangement.

Why will it not start in OFF?

Both sections explicitly exclude activation at assistance level OFF; select the applicable permitted configuration before following its instructions.

Can I use walk assistance with the wheels lifted?

The guide warns against operation without the wheels on the ground. It is a pushing function, not a lifting method.

Confirm the control unit first, then practise its complete start-and-stop sequence. Browse the Tern ownership collection and the related GSD technical guide.

Primary reference: Tern GSD Gen 3 QuickStart Guide, printed pp7 and12.